<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""><br class=""></div><div class="">Speaking as a huge fan of optional semicolons...</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">This seems clear:</div><div class=""><br class=""></div><span style="font-size: 11px;" class=""><span style="background-color: white; font-family: Menlo;" class=""> semicolon : sequence of statements</span><br class=""></span><div class=""><font face="Menlo" class=""><span style="background-color: white; font-size: 11px;" class=""> :: comma : sequence of elements in an array literal</span></font></div><div class=""><br class=""></div><div class="">and so it occurred to me that this should hold:</div><div class=""><br class=""></div><div class=""><span style="font-size: 11px; background-color: white; font-family: Menlo;" class=""> A semicolon : the last statement on a line.</span></div><div class=""><font face="Menlo" class=""><span style="background-color: white; font-size: 11px;" class=""> :: A comma : the last array element on a line.</span></font></div><div class=""><font face="Menlo" class=""><span style="background-color: white; font-size: 11px;" class=""><br class=""></span></font></div><div class=""><font face="Menlo" class=""><span style="background-color: white; font-size: 11px;" class=""> </span></font><span style="font-family: Menlo; font-size: 11px; background-color: rgb(255, 255, 255);" class="">∴ A </span><span style="font-family: Menlo; font-size: 11px; background-color: rgb(255, 255, 255);" class="">comma after the last array element on a line should be</span><span style="font-family: Menlo; font-size: 11px; background-color: white;" class=""> optional.</span></div><div class=""><br class=""></div><div class="">and these should be legal Swift:</div><div class=""><br class=""></div><div class=""><span style="font-size: 11px;" class=""><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(172, 172, 172);" class=""> let</span><span style="font-family: Menlo; background-color: rgb(255, 255, 255);" class=""> list = [</span><br class=""><span style="font-family: Menlo; background-color: rgb(255, 255, 255);" class=""> </span><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(39, 42, 216);" class="">1</span><br class=""><span style="font-family: Menlo; background-color: rgb(255, 255, 255);" class=""> </span><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(39, 42, 216);" class="">2</span><br class=""></span><div style="margin: 0px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class=""><span style="font-size: 11px;" class=""> ]</span></div></div><div class=""><span style="font-size: 11px;" class=""><br class=""></span></div><div class=""><span style="font-size: 11px;" class=""><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(172, 172, 172);" class=""> </span></span><span style="color: rgb(172, 172, 172); font-family: Menlo; font-size: 11px; background-color: rgb(255, 255, 255);" class="">let</span><span style="font-size: 11px;" class=""><span style="font-family: Menlo; background-color: rgb(255, 255, 255);" class=""> dict = [</span><br class=""><span style="font-family: Menlo; background-color: rgb(255, 255, 255);" class=""> </span><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(39, 42, 216);" class="">1 : 2</span><br class=""><span style="font-family: Menlo; background-color: rgb(255, 255, 255);" class=""> </span><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(39, 42, 216);" class="">2 : 3</span><br class=""></span><div style="margin: 0px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class=""><span style="font-size: 11px;" class=""> ]</span></div></div><div class=""><br class=""></div><div class="">equivalent to:</div><div class=""><br class=""></div><div class=""><div class=""><span style="font-size: 11px;" class=""><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(172, 172, 172);" class=""> </span></span><span style="color: rgb(172, 172, 172); font-family: Menlo; font-size: 11px; background-color: rgb(255, 255, 255);" class="">let</span><span style="font-size: 11px;" class=""><span style="font-family: Menlo; background-color: rgb(255, 255, 255);" class=""> list = [ </span><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(39, 42, 216);" class="">1, </span><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(39, 42, 216);" class="">2 </span><span style="font-family: Menlo; background-color: rgb(255, 255, 255);" class="">] ; </span></span><span style="color: rgb(172, 172, 172); font-family: Menlo; font-size: 11px; background-color: rgb(255, 255, 255);" class="">let</span><span style="font-size: 11px;" class=""><span style="font-family: Menlo; background-color: rgb(255, 255, 255);" class=""> dict = [ </span><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(39, 42, 216);" class="">1 : 2, </span><span style="font-family: Menlo; background-color: rgb(255, 255, 255); color: rgb(39, 42, 216);" class="">2 : 3 ]</span></span></div><div class=""><div style="margin: 0px; line-height: normal;" class=""><br class=""></div></div></div><div style="margin: 0px; line-height: normal;" class=""><br class=""></div><div style="margin: 0px; line-height: normal;" class="">Or, as the Language Reference would say:</div><div style="margin: 0px; line-height: normal;" class=""><br class=""></div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;" class=""><div style="margin: 0px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class=""><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class="">A semicolon (</span><code class="code-voice" style="border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; color: rgb(128, 128, 128); font-family: Menlo, monospace; word-wrap: break-word;">;</code><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class="">) can optionally appear after any statement and is used to separate multiple statements if they appear on the same line.</span></div></blockquote><div style="margin: 0px; line-height: normal; font-family: Menlo; background-color: rgb(255, 255, 255);" class=""><br class=""></div><div style="margin: 0px; line-height: normal;" class=""><blockquote style="background-color: rgb(255, 255, 255); font-family: Optima; margin: 0px 0px 0px 40px; border: none; padding: 0px;" class=""><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class="">A comma (</span><code class="code-voice" style="border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; color: rgb(128, 128, 128); font-family: Menlo, monospace; word-wrap: break-word;">,</code><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class="">) can optionally appear after any element of an array literal and is used to separate multiple elements if they appear on the same line.</span></div></blockquote><div style="margin: 0px; line-height: normal;" class=""><br class=""></div><div style="margin: 0px; line-height: normal;" class="">Or:</div><div style="margin: 0px; line-height: normal;" class=""><div style="margin: 0px; line-height: normal;" class=""><br class=""></div><blockquote style="margin: 0px 0px 0px 40px; border: none; padding: 0px;" class=""><div style="margin: 0px; line-height: normal;" class=""><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class="">A semicolon (</span><code class="code-voice" style="border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; color: rgb(128, 128, 128); font-family: Menlo, monospace; word-wrap: break-word;">;</code><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class="">) separates statements but is optional</span><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class=""> after the last statement on a line.</span></div></blockquote><div style="background-color: rgb(255, 255, 255); font-family: Menlo; margin: 0px; line-height: normal;" class=""><br class=""></div><div style="background-color: rgb(255, 255, 255); margin: 0px; line-height: normal;" class=""><blockquote style="font-family: Optima; margin: 0px 0px 0px 40px; border: none; padding: 0px;" class=""><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class="">A comma (</span><code class="code-voice" style="border: 0px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; color: rgb(128, 128, 128); font-family: Menlo, monospace; word-wrap: break-word;">,</code><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class="">) separates elements of an array literal but is</span><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class=""> optional after the last</span><span style="color: rgb(65, 65, 65); font-family: Helvetica, Arial, sans-serif;" class=""> element on a line.</span></div></blockquote><font color="#414141" face="Helvetica, Arial, sans-serif" class=""><br class=""></font></div><div style="background-color: rgb(255, 255, 255); margin: 0px; line-height: normal;" class=""><font color="#414141" face="Helvetica, Arial, sans-serif" class=""><span style="font-size: 11.375px;" class=""><br class=""></span></font></div></div></div></body></html>